In your situation, you can be expected to have to pay spousal support for some duration (up to half the length of the marriage, but there are so many factors that it is hard to say exactly how much and how long) and, dpending upon the child custody arrangements which are worked out, child support as well.

Will this take up most of your income? Hard to say, but it will certainly take up a lot.

Can you even afford divorce? Again, hard to say; it depends upon how much money you are making now. It is clear, however, that divorce will likely create substantial negative changes in your financial situation.